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Oracle Helidon CVE-2026-70727

| EUVDEUVD-2026-61682 MEDIUM
Improper Access Control (CWE-284)
2026-08-18 secalert_us@oracle.com GHSA-vw6c-3gcv-j5v9
Authentication Bypass Oracle Helidon
5.3
CVSS 3.1 · Vendor: oracle
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Severity by source

Vendor (oracle) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
5.3 MEDIUM

Network-accessible HTTPS endpoint requires no privileges or interaction; confidentiality impact is partial (subset of data) with no integrity or availability effect.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

1
Analysis Generated
Aug 19, 2026 - 05:18 vuln.today

DescriptionCVE.org

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 3.2.18. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

AnalysisAI

Unauthorized read access to a subset of data is possible in Oracle Helidon 3.2.18's Imperative Web Server component via unauthenticated HTTPS network requests. Tagged as an Authentication Bypass, this flaw allows a remote unauthenticated attacker with network reach to the affected service to circumvent access controls and retrieve restricted information without any credentials or user interaction. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation No special conditions are required from the attacker's perspective - the CVSS vector AV:N/AC:L/PR:N/UI:N indicates remote unauthenticated exploitation against Helidon 3.2.18 instances accessible over HTTPS without any special configuration needed by the target. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 5.3 (Medium) reflects confidentiality-only impact (C:L) with no integrity or availability consequences. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary fix is to apply Oracle's Critical Security Patch Update (CPU) for August 2026, available via the Oracle Security Alerts page at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-284 – Improper Access Control

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CVE-2026-70727 vulnerability details – vuln.today
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